Optical Materials
  Optical Glass
  Low Expansion Materials
  IR Materials
  Crystals
Micro-Optical Components
Fiber Optic Components
Light Sources & Photodiodes
Wafers
Services
     

Crystal Quartz

Crystal quartz is a positive uniaxial crystal. Optical grade crystal quartz features high transmittance from 200nm to 3500 nm, a high damage threshold, and excellent resistance to both scratching and chemical attacks. It exhibits a refractive index difference around 0.009 and it is widely used to make waveplates for polarization transformation.

 

 

                                                 Figure 1: External transmittance curve for 7mm quartz crystal

 

  Transparency Range (nm) 200~3500
 
  Crystal Symmetry Class Trigonal, D3(32)
 
  Lattice Constant (Å) a=4.9, c=5.4
 
  Crystal Class Positive Uniaxial
 
  Melting Temperature (K)
1740  
  Specific Heat (Cal/g·K) at 273K
0.17  
  Thermal Conductivity (W/m·K) at 300K
||: 9.5       : 6.10  
  Coefficient of Thermal Expansion (/K)
at 300K
||: 7.74X10-6
: 14.0X10-6
 
  Refractive Indices no=1.542737, ne=1.551809 at 630nm
no=1.527606, ne=1.53596 at 1550nm
 
  Laurent Series Equation (λ in um) no2=2.35728-0.0117·λ2+0.01054·λ-2+     
1.34143·10-4·λ-4-4.45368·10-7·λ-6+5.92362·10-8·λ-8
ne2=2.3849-0.01259·λ2+0.01079·λ-2+ 
1.6518·10-4·λ-4-1.94741·10-6·λ-6+9.36476·10-8·λ-8
 
  Density (g/cm3) 2.65  
  Young's Modulus (GPa)
||: 97.2
: 76.5
 
  Shear Modulus (GPa)
31.14  
  Mohs Hardness 7  
  Table 1: Crystal Quartz Properties
 

Copyright © 2016 Precision Micro-Optics Inc. All Rights Reserved.